G1: remove the false 'Fixed tariff not used' notification. One INFO line at start and an info note beside the setting (EN/NL) when price_service has a non-blank static_profile; the old notification id is dismissed at start. DOCS, migration step 5 and DECISIONS rule 7 now say what the code does. S05: whitespace-only static_profile counts as not set. G2: maintenance_enabled read through MaintConfig.from_options(). Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC